CVE-2026-27591

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{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.2.0,1.2.12)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[1.1.0,1.1.12)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.0.477)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "winter", "source": "cna", "vendor": "wintercms"}, "product": "winter", "vendor": "wintercms"}], "analysis": {"en": {"generated_at": "2026-03-19T18:52:57.981083+00:00", "value": {"mitigation_remediation": ["Apply the official patch by upgrading Winter CMS to version 1.0.477, 1.1.12, or 1.2.12 (depending on your release).", "Verify that the upgraded version is running and that role-permission modifications are no longer possible through crafted requests."], "summary": {"action": "Immediate Patch", "impact": "Privilege Escalation"}, "threat_synthesis": {"affected_systems": "All releases of Winter CMS older than 1.0.477, version 1.1.12, and version 1.2.12 are affected. The vulnerability is specific to the Winter product from the wintercms vendor.", "description_and_impact": "Winter CMS allows authenticated backend users to modify the roles and permissions assigned to their account through specially crafted requests while logged in. This flaw enables a user to raise their own level of access within the CMS, effectively granting higher privileges than originally granted.", "risk_and_exploitability": "The CVSS score is 10, indicating critical severity. The EPSS score is under 1%, suggesting a low current exploitation probability. The vulnerability is not listed in the CISA KEV catalog. Exploitation requires an authenticated backend session and the ability to send crafted requests; a successful exploit would allow the attacker to alter role assignments and elevate privileges."}}}}, "created": "2026-03-12T09:55:48.774405+00:00", "updated": "2026-03-20T15:36:57.681243+00:00", "vendors": ["wintercms", "wintercms$PRODUCT$winter"]}